Generating Traffic

$\parbox{0.2in}{\mbox{}}$$\parbox{5.25in}{\begin{singlespace}\textit{Today's scientists have s... ...entually build a structure which has no relation to reality.}\end{singlespace}}$$\parbox{0.2in}{\mbox{}}$
$\parbox{5.25in}{\begin{flushright}--- \textsc{{Nikola Tesla (1857--1943)}}\end{flushright}}$

$\parbox{0.2in}{\mbox{}}$$\parbox{5.25in}{\begin{singlespace}\textit{Reality is merely an illusion, albeit a very persistent one.}\end{singlespace}}$$\parbox{0.2in}{\mbox{}}$
$\parbox{5.25in}{\begin{flushright}--- \textsc{{Albert Einstein (1879--1955)}}\end{flushright}}$

This chapter discusses the use of the data acquisition and modeling methods presented in the two previous chapters to generate traffic in network experiments. In addition, it discusses the overall methodology we have developed for validating our traffic generation approach. We will distinguish between validating the method itself, and studying how closely the generated traffic approximates real traffic for properties not directly incorporated in the method. In this chapter, we consider the validation of the method itself, which means to verify that the source-level properties and network-level parameters of the traffic are preserved by the traffic generation method. The study of other properties is left for the next chapter.